From bf58708dc3bf305ab0f7422785dec1d27a97320a Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Sun, 22 Jul 2018 05:40:04 +0900
Subject: [PATCH] shareable: Bug fix: SetFinalizer must not be reset at
 dispose(false)

---
 internal/shareable/shareable.go | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/internal/shareable/shareable.go b/internal/shareable/shareable.go
index 904fc0bd7..f187eeb2a 100644
--- a/internal/shareable/shareable.go
+++ b/internal/shareable/shareable.go
@@ -205,7 +205,9 @@ func (i *Image) dispose(markDisposed bool) {
 		}
 		i.backend = nil
 		i.node = nil
-		runtime.SetFinalizer(i, nil)
+		if markDisposed {
+			runtime.SetFinalizer(i, nil)
+		}
 	}()
 
 	if i.disposed {